Minor tweaks to avoid compile-time warnings.

Initialize certain local variables for the benefit of compilers that
don't see `assert' as non-returning.  Add a file-ending newline where
one was missing.

src/AbsRndNumGenerator.cpp

@@ -66,7 +66,7 @@ AbsRndNumGenerator::~AbsRndNumGenerator()
 AbsRndNumGenerator*
 AbsRndNumGenerator::make_rndnum_generator(RNDNUM_GENERATOR impl, const unsigned long seed)
 {
-	AbsRndNumGenerator *rImpl;
+	AbsRndNumGenerator *rImpl = 0;
 
 	AbsRndNumGenerator::seedrand(seed);
 	switch (impl) {

src/Probabilities.cpp

@@ -957,8 +957,8 @@ bool
 Probabilities::parse_line(std::string &error_msg, string &line)
 {
 	char c = StringUtils::first_nonspace_char(line);
-	bool rv;
-	bool is_equal;
+	bool rv = false;
+	bool is_equal = false;
 	if (c == '\0') {
 		assert("parse empty line, cannot happen!\n" && 0);
 	}

src/Type.cpp

@@ -766,7 +766,7 @@ Type::get_bitfield_length(int length_flag)
 {
 	int max_length = CGOptions::int_size() * 8;
 	assert(max_length > 0);
-	int length;
+	int length = 0;
 	switch (length_flag) {
 	case ZERO_BITFIELD:
 		length = 0;

src/VectorFilter.cpp

@@ -94,4 +94,4 @@ VectorFilter::lookup(int v) const
 	if (!this->valid_filter() || ptable == NULL)
 		return v; 
 	return v = ptable->rnd_num_to_key(v);
-}
+}